Which Airlines Have Pilot Bases in Denver? (2026 Guide)

Denver International Airport (DEN) is one of the busiest airports in the world and one of the most sought-after places in the country to be based as an airline pilot. Its central geography makes it an easy commute from almost anywhere in the U.S., the lifestyle draw of the Front Range is hard to beat, and several major and regional carriers station crews there.

So which airlines actually have a pilot base — a crew domicile — in Denver? As of 2026, four Part 121 airlines base pilots at DEN: United Airlines, Southwest Airlines, Frontier Airlines, and SkyWest Airlines. Below is a breakdown of each, what you'd fly, and what the base is like, followed by the smaller operators and a couple of recent changes worth knowing about.

United Airlines — Denver (DEN)

Denver is one of United's largest hubs and a major mainline pilot domicile, which makes it one of the most significant pilot bases in the city. United has historically based a broad mix of equipment at DEN, spanning narrowbody Boeing 737 and Airbus A320-family jets alongside widebody flying, so a pilot can potentially spend much of a career in Denver while moving between fleets and seats.

Denver has traditionally been a senior base at United, but the airline's recent growth under its fleet-expansion plan has opened up more movement and more junior opportunity than in years past. For pilots who want to live in base rather than commute, the main trade-off is Denver's rising cost of living — a common theme among pilots weighing the Front Range.

You can see current pay scales, fleet details, retirement benefits, and hiring pathways on the United Airlines pilot profile.

Southwest Airlines — Denver (DEN)

Denver is one of Southwest Airlines' largest and busiest crew bases, and it sits at the heart of the airline's operation. Because Southwest flies a single fleet type — the Boeing 737 — a Denver-based Southwest pilot flies the 737 regardless of seat or seniority, which keeps training and qualification simple across a career.

As a large, high-departure base, Denver typically offers a wide range of trip types and show times, which can help newer pilots hold a line sooner than they might at a smaller domicile. Southwest's point-to-point network also means many Denver trips return crews to base, a quality-of-life factor pilots value.

For current Southwest pay, schedules, and hiring requirements, see the Southwest Airlines pilot profile.

Frontier Airlines — Denver (DEN)

Frontier Airlines is headquartered in Denver, and DEN is its founding base and one of its largest domiciles — arguably the most "Denver" of any airline on this list. Frontier operates an all-Airbus A320-family fleet (A320, A320neo, A321, and A321neo), so new hires earn a single Airbus type rating that covers the entire fleet and supports movement between aircraft as needed.

Frontier also runs its new-hire and recurrent pilot training at its Denver training center, so many pilots pass through the city early in their tenure regardless of where they ultimately end up based. As an ultra-low-cost carrier in a sustained growth phase, Frontier has emphasized relatively fast upgrade timelines, which is a meaningful draw for pilots targeting a left-seat move.

Full details on Frontier's pay, contract, fleet, and base network are on the Frontier Airlines pilot profile.

SkyWest Airlines — Denver (DEN)

On the regional side, SkyWest Airlines operates a Denver domicile flying the Embraer E175 as United Express. As the largest regional airline in the U.S., SkyWest carries flying agreements with United, Delta, American, and Alaska, and Denver is one of its roughly twenty crew bases nationwide. SkyWest also conducts much of its E175 training in Denver.

For pilots building toward a major, SkyWest's Denver base is especially notable because of the airline's Aviate participation and United pathway, which offer a structured route from the regional flight deck to a United cockpit. That makes DEN attractive both as a place to live and as a career stepping stone.

Compare SkyWest's pay, upgrade timelines, and mainline pathways on the SkyWest Airlines pilot profile.

Smaller operators and recent changes

Beyond the four carriers above, Denver Air Connection — a smaller operator based in the Denver area — flies United Express service and represents a niche Part 121 presence in the market, though it operates on a far smaller scale than the mainline and large-regional bases listed here.

It's also worth noting a recent change, because older base lists and forum posts can be misleading: CommuteAir closed its Denver pilot base in 2024 and consolidated its crew bases at Houston–Intercontinental (IAH) and Washington–Dulles (IAD). So while

CommuteAir once based ERJ145 crews at DEN for United Express, it no longer maintains a Denver domicile.

Why Denver is such a popular pilot base

A few things make DEN one of the most competitive bases to hold in the country:

• Central geography. Denver sits roughly in the middle of the country with nonstop service to almost everywhere, which makes it one of the easier bases to commute into and out of.

• Lifestyle. Proximity to the mountains, sunshine, and outdoor recreation is a genuine draw, and many pilots specifically bid Denver for quality of life.

• Depth of flying. With United, Southwest, and Frontier all running large operations at DEN, there's a wide range of trip types, aircraft, and career paths in a single city.

The main counterweight is cost of living: the Denver metro has become expensive, so pilots weighing whether to live in base versus commute should factor housing into the decision.

How to land a Denver base

At every airline here, base assignment is driven by seniority. New hires bid for their base in seniority order during or after training, and Denver's popularity means it often skews senior — though growth at United and Frontier has improved availability. The practical path to a

Denver base is the same as the path to any competitive domicile: get hired, build seniority, and bid DEN when your number supports it. Researching each carrier's fleet, pay, and upgrade timeline before you apply — using the profile pages linked above — helps you target the airline most likely to put you in Denver on the timeline you want.

Frequently asked questions

Does United have a pilot base in Denver? Yes. Denver is one of United's largest hubs and a major mainline pilot domicile, with a mix of narrowbody and widebody flying based there.

Is Denver a Southwest Airlines pilot base? Yes. Denver is one of Southwest's largest and busiest crew bases, and Denver-based Southwest pilots fly the Boeing 737.

Is Frontier Airlines based in Denver? Yes. Frontier is headquartered in Denver, and DEN is its founding base and one of its largest domiciles. Frontier also trains new-hire pilots in Denver.

What regional airline has a base in Denver? SkyWest Airlines operates a Denver domicile flying the Embraer E175 as United Express, with a structured pathway toward United through the Aviate program.

Did CommuteAir close its Denver base? Yes. CommuteAir closed its Denver pilot base in 2024 and consolidated operations at Houston–Intercontinental (IAH) and Washington–Dulles (IAD).

Is Denver a good base for a pilot? Many pilots consider it one of the best in the country thanks to its central location, easy commutability, and lifestyle. The main drawback is a high cost of living if you plan to live in base.

Base assignments, fleets, and hiring change frequently. This guide reflects publicly available information as of July 2026 — always confirm current base and fleet details with each airline before making career decisions.